The Dusky Fulvetta is a small (13 cm) bird
with brown upperparts, a rufous brown cap bordered by a thin black line, and
grayish buff underparts. The iris is light brown or reddish brown, the bill
is dark brown and the legs are pinkish. The Taiwan (nominate) subspecies
brunnea differs from the adjacent mainland race mainly in being slightly
smaller, with grayish buff rather than whitish underparts and darker
upperparts.

The Dusky Fulvetta lives in the understory
layer of evergreen and deciduous forests. It is usually found in small
groups, searching for insects and small berries. In Taiwan it is a common
resident year-round in forests from mid to high elevations.

References: A Field Guide
to the Birds of China (Mackinnon and Phillipps); 100 Common Birds of Taiwan
(Wild Bird Society of Taipei); N. J. Collar, “Endemic
subspecies of Taiwan birds—first impressions”, in Birding ASIA, Number 2,
December 2004